Safety apparatus for amusement or other auditoriums.



J. H. GROSIER. v sAIETY APPARATUS FOR AMUSEMENT OR OTHER AUDITOBIUMB.

APPLICATION FILED HA3. 19, 1909. RENEWED NOV. 18 1910- 5 b Patented Aug. ,1911.

., 6 sinus-sunn- 1.

J. H. GROSIER. SAFETY APPQMTUS POE AMUSEMENT OR OTHER AUDITOBIUHB. APPLIOAHOIPILED pun. 1a, 1909. nnnwnn 10v. 18, mo.

1,000,154. 1 a en ed Aug. 8. 11111.

- 1 0 BHEBTHIQBBTQ. 127-3 11 f f Q2, 17 a, E

mumm- J. H. YGROSIER.

T SH ETY APPARATUS FOR AMUSEMENT 08 OTHER AUDITOBIUHB.

SIX-WED 10V. 18, 1010.

- Bgtented Aug. 8,1911.

v APPLICATION FILED I'A'R. 19, 1909- R 1,000, 154.

UNITED STAQBEMPATENT OFFICE.

Joan E. cnosmn, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOB. orsix rnn'rns ro enoncn nrownm, or PITTSBURG, rmvusYLvama,

sarn'rr arranarus ron mussnnnr or. ornna aunrroawms.

Application filed uma 19, 1909,

To all whomit my concern:

Be it known that I, Jomv H. Guoemn, a citizen of the United States, residin at the city of Philadelphia, in the county Philadelphia and State of Pennsylvania, have in- I vented. certain new and useful Improvements in Safety Apparatus .for Amusement or other Auditoriums, of which the followlors,

ranged for use the same time, the lights in the belit and the locks on. the exit doors, re-

pliance for use in degree or extent.

tures of my said ing is a specification.

iy invention relates to safety apparatus for use in amusement and other auditoriunis,

or the like; and in such connection it relates particularly to a device for automatically lighting an auditorium and unlocking doors, when abnormal conditions exist, at other points or places. For example, in the particular embodiment of my invention as shown in the drawings, and as hereinafter specifically described, the apparatus is arin connection with a moving ictui'eprojection machine so that when any 'sarrangc'ment or failure to work 'roperly takes place of such a projection mac ine, the electric currents employed in connection therewith will instantly be broken, and. at auditorium The nature, scope and characteristic feainvention will be more readil understood from the following descriptlon taken in connection with the accomchine, in which apparatus panying drawing forming part hereof showmg one specific embodiment of my invention for use, in a, moving picture projectiomma- Figure 1, is a diagrammatic view of the of my invention asarran'ged, for use in connection with'moving picture display parlors, the said view,

' as... of Letters Patent. Serial Ilc. $4,450. Itenewed November 18, 1810. SerialJIo'. 598,087.

such as theaters, moving picture partime to close other cir'" the greatest possible with and adapted respectively,

17, with certain.

showing the va-' Patented Aug. 8, 1911.

rious circuits and controlling mechanism operating in conjunction therewith. Fig. 2, is a longitudinal sectional view of the main magnet-controlled switch, constitutin a principal element of my presentinvention.

ig. 3, is a top or plan view thesame,-.

partly in section. Fig. 4, is a sectional dc tail view, partly in elevation, of the releasing mechanism of the switch shown in Fi 2 and 3. F1 5, is a similar view, with t e arts thereo shown in operating or releasmg position. Fig. 6, is a perspective view of the combined armature and contact make-and-brcak device, constituting a part of the releasing mechanism of the switch, showninFigsl-Q and 3. Fig. '1, isan neath plan view partly in section, of the main switch shown in Fig. 2. Fig. 8, is a fragmentary side elevation of a contact ma e-and-break device, which is adapted to be controlled by th'e/positionof the lamp house of the movingvpicture projection apparatus. Fig. 9, is aview similar to F" L 8, with a portion of thelam house shown in a position ito'open or reakthe contact. Fig. 10. is an end elevation of the device shown in Figs. 8 and 9. Fig-11, is a fragmentary plan view and-break device adapted "to be controlled by the open or closed position respectively, of the lamp house i door.

side elevation of the same. Fig. '13,is an "end elevationof the same. Fig. 14, is asec I tional plan View of a contact make-andrbreak device adapted to be controlled by respec of a contact make? tively, the opening and closing of the mag azin'e door. the same. Fig. 16, 1s afragmentary elevation of a portion ofthe pro ection apparatus with two forms of contact make-ands Fig. 15, is an end, elevation of break devices, shown, in connection there-f,

ated. by the top .loop guide and "thegate of the machine, whereb 'ahnormal positions of either of these evice'sgwill Fi 20,-,is; a sit ma e-and-break device adaptedto be con-1 t rolled'hy. the belt of the movlnggpicture 10p ortions, thereof remove e elevation of; acontact as Fig. 12,15 .1 y a projection apparatus, where the same isf lid.

v con-trollin e5 driven by any preferred form of electric motor. ig. 21, is an end elevation of the device shown in Fig. 20.. Fig. 22, is an clevation of a device for closing a circuit when the speed of the moving picture projection apparatus, falls below a predetermined limit. Fig. 23, is a fragmentary plan view of a portion of the device shown .in Fig. 22. I

Fig. 24, is a side elevation of a contact make-and-break device, adapted to be used in connection with the bottom loop-guide of the projection apparatus; and Fig. 25, is

an end elevation of a. portion of the structure shown in Fig. 24.

Referring now more particularly to Fig. 1,

of the'drawings, which, as before stated, is adiagrammaticview of the various circuits and electrically connected parts of the apparatus and auditorium of a moving picture display parlor, 30 and 31', are the main sources of electric supply, from which branches 32 and 33, respectively, run. to the pivot end terminal clips 46 and 47, Fig. 7, of the main magnet-controlled switch A. When the moving picture projection apparatus is runnlng, the blades 34 and 35, re-

spectively, contact with clips 36 and 37, from which run the various circuits associated with the operation and control of the projection apparatus. Switch A, is also provided with blades 38 and 39, which are adapted respectively, to contact with clips .40 and 41, from which runs the circuit 42,

the auditorium lighting apparatus, an clips 177 and 178, from which ru ts the circuit 43 controlling the magnetcontrolled unit locks B, Fig. -1, on the exit doors of the auditor um.

knife switch commonly used in electric apparatus, the bladesI34-and 35,- being pivoted lon respectively, to the usual form of terminal clips 46 and 47, 'which as before indicated, are connected by wires 32 and 33, to a source of electric supply. The blades 38 "and Y39, of switch A, are reslpectively,- 'angular tions of the-b ades 34; and 35. he

- bla cs 34 and 35, arenorniall i held in contact with the cli s 36 aiiditl by means of a latch 48, whic e ages magnet-com trolled lock C, W113i) will Hereinafter be more fully described. Springs 49, normally tend to disenga e the blades 34 and 35, from the clips 36 and 37 to thereby disccmnect the 45, 1s a double pole plug switch 68.

spects resembles the ordinary double pole same from the source of electric supply. \Vhen the blades 34 and 35, are disconnected from the clips 36 and 37, then the blades 38 and 39, are in contact with the clips 40 and 41, and 177 and 17 8, and thus establish electric connection of the auditorium lighting apparatus and the magnet-controlled locks B, on the exit doors, with the source of electric energy.

The magnet-controlled unit lock C, will now be described. The latch 48, projects upwardly from the insulating handle-bar 50 of the switch A, and its upper ngl is forme into a hook 51, whiclrnornmi ly engages a roller 52, carried by-a rocking-member 53,

which is held in its normal position by means insulating block 62, pivoted at 63, to the containing casing 64, to establish the circuit through the magnets 66 and resistance coil 67, but when the pawls 56,'are released from the contact plates .60 and 61, the circuit is broken thro h the magnets 66, and resistance coil 67. hisulating block 62, carries an armature 65,- which is arran ed in front of and adapted to be attracted %y the poles of the magnets 66. The containing casin 64, also incloses a resistance coil 67, arrange in the same circuit, as the magnets 66, as will hereinafter be more fully described. Ar r ed in one end of the insulating bificlk e wires running from the resistance coil 67, and around the ma screws 69. and 70, which are electrically conets 66, terminate in needed with the sleeves 71 and 72, of the plu witch 68. .A bridging-piece 73, exten s between-aha screws-69 and 70, and is carried by the spring 74, the outer end' of which is so arranged as to engage the-projecting handle of the plug-switch 68, sdthat when the plug-switch-68, is in position the bridgi -piece 73, will beheld out of contact w igithe screws 69 and 70, and when the said. plug-switch 68, is removed,- the bridgi '-piece 73, will contacflwith the said 11812111111 25 screws 69. and 70, and thereby to establish a short circuit across the same.

, The operation of the main switch A, and

its associated controlling release-lock C, will now be described. In the normal osition of the apparatus, that is to say, w en the moving picture machine is' operating nor-.

mally, thev current will flow from the mains 30 and 31, through the wires 32 and 33, to

2o ,ewitch plug 68 to the line wire 80, then the ivot cli s 46 and 4l7; then throu h the and will now betraced. Startin from the clip- 36,the circuit asses throug the wire 75, and then throug the magnets 66, which are connected in multiple, by means of wires 7 6 and 77. .The current after], assing through the magnets 66, combines a passes through theivire 7 8, to the contact 60, carried b the pivoted armature carryin insulating b ock 62, then passes through the dogs 56,

I and the ivot pin 57, to the contact 61, cartied at t e other side of thepi'voted insulatmg block 62, then passes through the wire 79, to the resistance coil 67, and terminal switch A.

' aforesaid, the magnets 66, will screw 70, then through one pole 'of the through'anly one of a series of automatically or manual y controlled circuit closing devices, which will be hereinafter more fully described. The current returning to the other line 81, after passing through any one of the aforesaid circuitfclosing devices, passes through the other pole of theplugswitch 68, to the terminal screw 69,then by the wire 82 to the clip 37,015 the mainthrough any ofthe automaticall or manuallycontrolled circuit closing) evioes, as e energized,

thereb attracting the armature 65, which 15 carrie bv the pivotedinsulating block 62,

to thus draw side to release the dogs 56, and consequently,

- the swinging-member 53, so as to permit the hook-51, of the latch 48, to be disengagged and thus to free the blades 34 and 35, to allow the same to be forced out of engagement with the clips 36 and 37, under the tension of thespring 49, and causing the blades 38 and 39, to engage their re spective clips 40: and 41, ,and 177 and. 178.

All of the circuits connected with the clips d t 1e 36 and 37, will thereby be broken, an circuits connected ,with the clips 40 and 411, and 1 77 and 178, will be established.

To relatch the switch A, the handle thereof, first manually shifted so as to discngu e the blades 38 and 39 from the cli s 40 and 41 and '177and 17 8 which breaks t 1e lighting and' door control-ling circuits 42 and 43, and at.the same time establ shes through the blades34 and 35, contact with ulltlie circuits controlled b Bound 37. It shouldbe un stoodthat the the clips 36and 37, and thereby establishes the said, clips swinging member 53, is-returned to its norma] position by means ofthe sprin 54, aftcrithe hook 51, has been dlsenga ed t erefrom and the dogs 56, arefiimuftaneouslyreturned to their normal pos11ons'by 'means.

hen the circuit-is established is insulating block to one of the pins 58, so that the parts of the net controlled lock C, are in Cpro 18! position, when the switch is relatche should be uhderstoodof course that the'resiliencly of the spring latch 48, will permit its hob to pass over the rol1er52 and to again cnga e and be held thereon.

.n the diagram shown in Fig. 1, the arclight 83, of the moving picture projection apparatus is controlled by a circuit estab lished through the wire 84, runnin" frontthe clip 36, of the main-switch A, tirough one side of the knife-switch 85, then thr 11 h a the are 83, then through the wire 86, to

resistance coil. 87, which prevents abnormal; "discharge of the current through the said" are, then, passing through the wire 88, may through the other side of the knife-switch '85, and returning through theywire 89, to

the other clip 37,'of the main-switch Al P Attention will ow be to the va rious types of circuit closing devices, which n are shown in Fig. 1, n diagram, and m Figs.

8 to 25, in detail, these venous circuit closin devices being to elose tllB-Cll0l11l';,,? passing"""through the magnet-controlled loclf" C, to actuate thesame so as thereby to opcrate the main switch A, when abnormal con ditions exist, at various points or places in I the projection apparatus.

It is desirable that whenever the ,lamp house door is opened, that all of the circuits connected with ,the projection apparatus be instantly broken, so that by no pos- Samm can the film be ignited by the ar -lg contained within the lain house, when exposed, by the .openingof t e door, and for this purpose, the contact, make-and-break device E, shownin Fi s, 11 to 13, offthe drawings, is employe I I more particularly to Figs. l1wt'o 13, of the drawings, the lamp house 93, is provided in its interior with an inisulatingblock-Q, which is traversed by :a headed pin 95, under the tensionof a spri 9'6, whlchnormallyg ltends to cause the bee 97, of the pin 95, to contact with the terminal plates 98 and 99, which are connected by the wires 100 and 101 to the lines 80 and 81, of the circuitof the magnet-controlled lock C. ,The doorml i 102, of the lamp house, is {so arranged that when the same is closed, its fasteninglafcch 103,. will engage the outer end of the pin 95,.to therebymaintain the head 97, of the in 95, away from the plates 98 and 99, 5

so t at the circuit is maintained open .so'

long ,astheuloor is closed, but the circuit is instantly established, theinomentthe door is opened, and in this manner throws? the switch A, as will readilbe understood hound?" the hereinbefore descri d construction and operation of the sameand its associated magnetrcontrloll ed lock :0. The contact make-and-break device E, arranged in con *netion with lamp house 001:, is dis-lit Referring now ,3

posed in such position as to bridge the lines 80 and S1, at a point immediately after these lines leave the switch described- The remaining circuit closing devices arranged in conjunction with the projection apparatus, are preferably arranged so as not to close the circuit to cause the switch A, to be actuated, except when the lamp is in position for projecting a picture on the screen. To render these contact make-and-brcak de vices inoperative, a special form of contact make-and-break device F, is employed, the same being shown in Figs. 8, 9 and 10, of the drawings, and adapted to be operated by the lamp house bracket 104, when the said lamp house, is moved sidewise on its slides 105. I

.The construction of the contact make-andbreak device F, is as follows z-Secured to the lamp house slide 105, is a downwardly projecting bracket 106, having an insulated extension 107, 'hich carries a bracket 108, in which an insulated pivoted block 109, is mounted, this block carries on its outer end a contact-plate 110, normally held in contact with a plate 111, by means of aspring 112. The circuit is established through the wire 80, running to terminals 113 and 114, passin through the terminal plug (38, hereinbeforc 113, then through t e bracket 108, spring 112, plate 110, plate 111, terminal 114, and

' returning at this point to the line 80. It

of the insulate will. thus be seen, that the contact makeand-break device F, is interposed in the line 80, so as to break the circuit passing through the same, whenever the ,lamp house, is pushed to one side, in its inoperative po ition, as shown in Fig. 9, when the brac tet 104, thereof, en es with the inner free end lock 109, thereby serving to raise the plate 110, from contact with the plate 111, as clearly shown in Fig. 9, for the purpose as hereinbefore fully stated.

For the manual control of the operator, a; push-button G, or a plurality of the same, may be used to bridge across between the lines 80 and 81, at any preferred point,-

which is readily accessible to the operator or any other properly, designated "person. This push-button may be of any preferred type and of course it will be readily understood that any other form of manual opcrated'contact make-and-break device may,

be used, in lieu thereof. It will also be understood, that these push-buttons may be used across the lines 80 and 81, in 'advance 3f or beyond the contact make-and-break ev' F actuated according to the position of tl'i lhmp house.

\ Where an electric motor is used to drive the projection machine, it is desirable that I some means of controlling the magnet-controlled switch A, be employed and which will be actuated, whenever the belt slips or flies oil of the machine, and thereby to kill all the lines or circuits connected with the projection apparatus. For this purpose, the device H, shown in Figs. 20

and 21, of the drawings, is employed. Re-

ferring now to these figures 115, is the main shaft of the motor, and 116, the pulley thereof, 11?, is the driving belt and 118 the driven pulley forming a means for actuat- Pivoted to bear against the underside of the belt 117,

the constructive arrangement being such that if the belt 117, becomes disarranged the lever-arm 119, will fall to the position shown in dotted lines in Fig. 20, and the circuit will then be established between the contacts 122 and 123, which are mounted on a suitable insulating block 124, and electrically connected with the lines 80 and 81, by means of the wires 125 and 126.

Should the speed of the projection machine fall below a predetermined limit, the

contact make-and-brcak device I, shown in Figs. 22 and 23, will be employed. 'I h1s device, consists essentially of a vertical shaft 129, whichis rotated at a 'high rate of 9 speed from any suitable rotatin portion of the projection machine. To t ,e upper end of the shaft 129, is fixed a collar 130, having springs 131, secured thereto and which extend downwardly and are secured at their lower ends to a slidable flanged collar 132. Mountedon the springs 131, are

weights 133, providing in effect a governor, which is driven as herembefore described, by any suitable rotating part of the 5 projection-machine. Arranged beneath the flanged collar 132, is an insulating block 134, which carries two contact springs 135 and 136, connected by the wires 137 and 138,

to the lines 80 and sl, of the magnet-lock 1 circuit, the arrangement being such that when thespeed of the projection-machine falls below a redetermined limit, a circuit will be established from the lines 80 and 81, through the wires 137 and 138, contacts 135 and 136, and flanged collar 132, to thereby operate the main switch A. g

It sometimes occurs, in the operation of a moving picture prbjection machine that the film will not be properly fed intothe bot- 12C! tom magazine or box, for containing. the' reel of film after its passagethrough the machine. This frequent-1y causes tangling V of the film, whichnecessitates stoppage o the machine, and sometimes throws a por- 2 tion of the filmjinto proximity to the intense heat of the are, frequently causlng firesv as a result.- v To avoid this such a contact makeand-tweak device, J, as shown in F1 24 and 25, is employed, which consists o a le- 1 extension ltii which;

Yer-arm 139, secured to a pivot-pin 140, passing through a bracket 141, of the bottom loop guirlcfaiulcarryingat its outer free end on idler-roller 142. which normally rests on the film 143. The pivot-pin 140, also car? rice :1 contact-arm 144. the ivot enrl of which is electrically connector by the wire 145 to the line 80, and is arranged to contact with -a pin 146, connected by the wire 147 to the lino'81, the constructive arrange ment of which is such as that the contactarm 14-1, will be normally held out of contar-t with the pin 146, by th'efilm, but, in the event of an abnormal loop in the film at this point. the contai-tarm- 1-i4, will fall, and establish a circuit through the pin 146, to

thereby operate the main swit'ch A.

.15, the two being substantially i critical, :1

description of one will sufiice. Thisdeviee is inmany respects like the contact makefandbrcak de ice E, used in connection with the door of the lamp house, and COIlSlSlZS an insulating B100 530, tl irough which passes a pin 151, which is maintained under .insion of a spring: 152, against the door 15o. of the magazine 154. The pin 151," is provided with a head 155, which is ads ted when the door is open to contact witi the lates,:156 and 157, respectively connected 3'' the yv-ires .158 and 159, to the lines and B1.

In case an abnorm'aharnount of film should be, fed from the to magazine, that assmgi-in front of the lens, the film is iable to entangle, and come Within the zone of. intense heat of the arc, and thereby cause is to say, if more befed t ran the machine is ignition of the same. Also in the event of theoperator opening'thei gate of the 1-0- jection machine it is desirable to be she to cause the magnet controlled switch A, to be operated so as thereby to kill 'the circuits confi'elted with the projectiommachine. For this purpose, a; con'iposite- 'makea11clbreak device M l shown in Figs. :16 to 19, is

employed, the "parts of whieh at'e mounted inan insulating block 171. A pin 1G2 untier the tension of a. s' ringltifi, has a bent bears against the top of the gate of the machine, the arrangemeut beingsuch, that the top edge of the "i gate or any other suitable portion thereof will hold the pin 162, in its uppermost ositionwheu the said flgate is closed, gate-"is open, the hea'cl 164, of vth in 152, will contactwith. one portion I: of ne if'of theeonta'ctj-plates1,60 antl lfilj,

person.

thereby to establish a circuit between the lines-8O and 81, through the wires 167 and 168, which are connected to the respective plates 160 and 161. The contact plates 160 and 161, extend downwardly and outwardly at one portion thereof. so as to liein the path of the cop guide of the machine and this arrangement is such that if a bracket 169, be

improperly lowered by the operator to allow more film to Jass than is .being fed by the machine, it will establish a circuit across bet ween the contacts 160 and 161, and thereby actuate the magnet-controlled sWitcb."A, to kill the circuits connected with the projection-machine.

In the foregoing apparatus there isprovided a means for cutting out circuits con nected with the operation of the movingpicture projection machine at. the same. time closing circuits to ignite the auditoriumlights, and to release the locks on the exitdoors of such auditorium which a paratus is adapted to be controlled by a normal conditions existing within the; roiection machine or to be actuated at willoi It will of course be undorstooithet theof the apparatus when applied on movin picture projection machine but changesqsue as will be readily understood by thoseskilled pivoted bracket Ill-9, of the top a proper foregoing descriptiomis a specitic usqonly in the art may be made to suit the defined apparatus of 'my said invcntionto many other uses and conditions. "For example, the saicl' described inventioninay be arranged to be .used in connection'yvith spot light orother apparatusintheaters where not necessarily moving picture machines-are em loyed. p

he particular constructive arrangement of the magnet-controlled locks B, on the B-y reference to Figs. 2; 4, and 5'; it will be seen that the spring 4%) produces a moves ment of the book 51 which actson the L shapezl swinging member 53 having one arm pivoted at 55 and its other arm projecting so as to engage beneath the hook 531. The

hook 31 merely rests oi the r0 l1er-52 c n the end or t e last named arnrso. as to permit Ithe member -53 .to swing freely away from provided the-dogl las been released (Fig.

7 electric light the locking mechanism.

, device to the source of energy and circuit, a movable locking mechanism to the lio( )ir;,\\'liile" it, is' 'iiizbontact' therewith,

so as to permit the member 53 to swing.

Having thus described the nature and characteristic icatures of my said invention, what I claim as new and desire to secure by, Letters Patent is:- "t

1. In a safety apparatus for auditoriums employing film-picture projection lamps, an electric fight for the lamp', a circuit therefor, a source of energy, a switch connecting the source'of energy to the said circuit, normally open auditorium translating circuits, as spring tending to open the sald switch, contacts associated with the said switchand-n arranged to close the auditorium circuits when the spring is free to act, a catch to lock the projection lamp circuit closed, an electro-magnet to control the, release of the switch from the catch, andmeans for energizing the magnet on the occurrence of abnormal conditlons associated with the projection lamp. 2. In a safety apparatus forauditoriu'ms em'ployi'n film-picture projection lamps, an

for the lamp, a circuit therefor, a source of energy, a switch connectingthe source of-energy to the-said circuit,,hor-' lnally open auditorium 'translat-in circuits, a spring tending to open the said switch, contacts associated with the said switch and arranged to close the auditorium circuits when the spring is free to act, a catch to lock the projection lamp circuit closed, an electro-magnet, an armature for the magnet normally locking the catch, a normally open circuit-for the, electro-magnet, and means associated with the lamp for closin the magnet circuit on the occurrence of a normal conditions. I

3; In an apparatus of the character described, an elect-riclcircuit, a translating device in the circuit, aswitch to control the hold the switch'closed, an electro-1nagne't,an open circuit therefor, an armature for the magnet arranged to normally engage and lock=the movable locking mechanism, and means for. closing the magnet circuit, and causing the armature to release the lock' fo r 4., Inpan apparatus of the character described, a source of electric energy, two translating devices, ,a double-throw switch in one position connecting one translating in the other position connecting the other "translating device t'o'the source of energy, means tending to cause thc-switchfto connectthe second translating device to the source of energy, a locking member on the switch, a catch to-hold the switch normally so as to connect the first translating" device to the sourceof energy, an electro-ma net having a movable armature indepen ent ofv the mally lockin ca-us the dog moons;

catch forcausin the armature'tofinihintain the catch in Ice in switch, a normal} not, and means: cuit.

engagement with the .ppen'cn-cuit for the mag- 'r closing the magnet cir- 1 15. In an apparatus of the character deczibed, an "electric circuit, a translating device in the circuit and arranged to control the said; circuit, a swinging member havin a projectionextending beneath the hoo on the hook tending to cause it to swingthe projection away from the book, a (fognor the swinging member against the action 0 the s ring, anelectro-ma ct,

, a switch having a hookv a. spring acting l an armature there or arranged normal y to prevent'the dog from releasing the swinging member, a normally open circuit magnet, and means for closin circuit on the occurrence of a normal conditions in the said circuit.

' 6. In an apparatus-of the character described, an electric circuit, a translatlng dcvic in the circuit, a switch having a, hook and arranged to control the-said circult, an L shaped swinging member pivoted by one slim and having its remainlng arm beneath the-hook so as to permit thev latter arm to be swung away from and by the ho0k ,wh 1lein? contact therewith, asprmg acting on thehook so as to tend to push the said arm away from thehook, a dog to normally prevent the inovement of the swinging member, and meai s for' locking and releasmgthe' dog;

Li'ln 'an'apparatus'of the character i e-' scribed, an electric circu1t,"a sw tch therein; hayling a latch member, 'a swinging member having locking engagement with the sw1tch,; a dogxto hold the swinging memberm look ing pdsit-ion, an electro-magnet, an armature therefor arran ed in one posit-ion to cause the dog to he (1 the swinging'member 1n lockingposition, and in another pos tion to cause thedog to release the swrnging member, and means for closing the circult of the electro-magnet.

8. In an apparatus the character de scribed, an electric circuit, a sw 1tch therein having a latch member, a swmgmg member having locking engagement with theswi-igch, a dog to hold the swinging member in look-- ingjposition, an e1ect-ro-magnet an armature therefor arranged in one.pos1t1on to cause the idog to the swinging member 1n lofc g position, a d in another position-to tore ease the swinging memclosing the circuit of the ber,"ineans or for the the. magnet/Q electro'magnet, and an automaticallyoperated doorv latchmember c switch, 1

9. In an apparatus of the character de scribed, an elecfiifihjcircuit, axswitch therein ontrolled by the having alatch iiileniijer, a swinging member,

having locking iiggigementwith the switch, a dog to hold the swinging member in looking position, an electro-magnet, an armature therefor arranlged in one position to cause the dogto ho d the swinging member in locking osition, andin another position to cause t e dog to release the swin ing member, means for closing the circuit 0 the alectrounagnet, an automatically operated door latch member controlled by the switch, and contacts controlled by the armature and arranged to open the last nemed circuit 10 when the, door latch member is released. In witness whereof I have hereunto set my signature in the presence of two subscribing witnesses.

JOHN H. CROSIER. Witnesses? t t J. Wnm'sn DoUeLAss,

THOMAS M. SMITH. 

